Generalized Woodall primes of the form `n`•19ⁿ-1

Current data

12, 410, 33890, 91850, 146478, 189620^[1], 280524

Remarks :

The sequence A299382 in OEIS

2024-10-25: Checked n = 1 - 100000, Gary Barnes, double-check, released
2023-08-10: none, Ryan Propper, released
2023-04-29: Checked n = 1000000 - 1600000, Ryan Propper
2023-04-19: Reserved by Ryan Propper to n = 1600000
2023-04-10: Checked n = 400000 - 1000000, Ryan Propper
2023-04-01: Reserved by Ryan Propper to n = 1000000
2016-02-08: Checked n = 100000 - 400000, Steven Harvey
2015-08-21: Found n = 280524, Steven Harvey
2015-08-21: Reserved by Steven Harvey to n = 400000
2014-03-13: Checked to n = 25000, Steven Harvey, double-check
2012-10-10: Checked to n = 25000, Thomas Ritschel
2010-11-01: Checked n = 18 - 4000, Steven Harvey, double-check
2008-11-06: Found n = 189620, Hugo Platzer
2008-10-25: Found n = 146478, Hugo Platzer
2008-10-16: Found n = 91850, Hugo Platzer
2008-10-15: Reserved by Hugo Platzer to n = 200000
2008-10-15: Checked n = 40000 - 100000, Hugo Platzer
2008-10-13: Reserved by Hugo Platzer to n = 100000
2005-01-03: Checked n = 5000 - 10000, Mark Rodenkirch
2004-12-21: Reserved by Mark Rodenkirch to n = 10000
2004-12-21: Checked n = 18 - 5000, Mark Rodenkirch
2004-12-15: Reserved by Mark Rodenkirch to n = 6000
2004-12-03: Reserved by Mark Rodenkirch to n = 5000
2004-01-20: Found n = 33890, Steven Harvey